7272878181 has 8 divisors (see below), whose sum is σ = 9698787840. Its totient is φ = 4847776992.

The previous prime is 7272878161. The next prime is 7272878191. The reversal of 7272878181 is 1818782727.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7272878181 - 2⁵ = 7272878149 is a prime.

It is a super-2 number, since 2×7272878181² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7272878161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 180805 + ... + 217338.

It is an arithmetic number, because the mean of its divisors is an integer number (1212348480).

Almost surely, 2^7272878181 is an apocalyptic number.

It is an amenable number.

7272878181 is a deficient number, since it is larger than the sum of its proper divisors (2425909659).

7272878181 is a wasteful number, since it uses less digits than its factorization.

7272878181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404235.

The product of its digits is 702464, while the sum is 51.

The square root of 7272878181 is about 85281.1713158303. The cubic root of 7272878181 is about 1937.4720128930.

The spelling of 7272878181 in words is "seven billion, two hundred seventy-two million, eight hundred seventy-eight thousand, one hundred eighty-one".